AV3 deployment

Current set-up is Nod32 2.7 Lan Update server on Server2 and Remote admin server. All clients are deployed with AV2.7.

Now i want to upgrade to V3 so I've got the new version of Remote Admin server and console installed on our new server (IBM X3500) oasys, and set-up a mirror server thingy and deployed to that server a client install to test (as it didn't have a AV as it's a new server ) All is good.

So to further test i deployed to my machine and it installed and the new V3 icon appeared in my task bar. However i install have Version 2.7 installed.

How do i upgrade all my client to V3 and the new remote admin server, or is there an easy way of uninstalling V2.7 off my clients?